Normally closed pneumatic diaphragm valve
I. Detailed Information on EG6B41J Pneumatic Diaphragm Valve (Normally Closed):
Notes for this product (please carefully read the instructions provided by our company before installation):
(1) Since the diaphragm is a vulnerable part, it should be replaced regularly according to the characteristics of the medium.
(2) Limited by the diaphragm material, diaphragm valves are suitable for low-pressure and relatively low-temperature applications.
(3) Generally, they are not suitable for pipelines with temperatures above 60°C, pipelines transporting organic solvents and strong oxidizing media, or pipelines with relatively high pressure.
II. Product Features of EG6B41J Pneumatic Diaphragm Valve (Normally Closed):
G6B41J-10 Type: Normally closed pneumatic; G6B41W-6.4 Type; G6B41J-6.4 Type; G6B41FS-6.4 Type. Design and manufacturing follow: GB12239; Structural length follows: GB12221; Flange connection dimensions follow: GB4216.4; Testing and inspection follow: GB/T13927. Pneumatic lined rubber diaphragm valve (normally closed)
III. Purpose and Main Performance Specifications:
1. It can be used as a switch mechanism to control the flow of media in pipelines transporting different fluid media at various temperatures, depending on the lining material selected.
2. Recommended application ranges for various lining materials of G6B41J normally closed pneumatic lined rubber diaphragm valve:
Lining Material (Code) | Applicable Temperature | Applicable Medium |
Hard Rubber (NR) | -10°C～85°C | Hydrochloric acid, fluorosilicic acid, formic acid, phenolic acid, hydrochloric acid, 30% sulfuric acid, 50% hydrofluoric acid, 70% phosphoric acid, alkalis, salts, metal plating solutions, sodium hydroxide, potassium hydroxide, neutral saline solutions, 10% sodium hypochlorite, wet chlorine gas, ammonia water, most alcohols, organic acids and aldehydes, etc. (excluding strong oxidizing agents such as nitric acid, chromic acid, concentrated sulfuric acid, and hydrogen peroxide and other organic solvents) |
Soft Rubber (BR) | -10°C～85°C | Has good wear resistance. Mainly used in sulfuric acid below 50%, sodium hydroxide, potassium hydroxide, neutral salt bath solution and ammonia liquid, cement, clay, coal ash, granular chemical fertilizers and solid fluids with strong abrasiveness, various concentrations of thick liquids, etc. |
Butyl Rubber (IIR) | -10°C～120°C | Corrosion-resistant and wear-resistant. Resistant to most organic acids, alkalis, hydroxides, inorganic salts, inorganic acid elemental gases, alcohols, aldehydes, ethers, ketones, esters, etc. |
Neoprene (CR) | -10°C～120°C | Animal oil, vegetable oil, inorganic lubricating oil, and corrosive mud with a wide pH range, with good abrasion resistance. |
Cast Iron (Unlined) | -40°C～100°C | Non-corrosive media |
IV. Recommended Application Ranges for Diaphragm Materials:
Diaphragm Material (Code) | Suitable Temperature | Applicable Medium |
Butyl Rubber (Grade B) | -40°C～100°C | Good acid and alkali resistance. Resistant to 85% sulfuric acid, hydrochloric acid, hydrofluoric acid, phosphoric acid, caustic alkali, and various esters. |
Natural Rubber (Grade Q) | -50°C～100°C | Used for purified water, inorganic salts, and diluted inorganic acids. |
V. Main Performance Parameters:
Model | Nominal Diameter DN (mm) | Working Pressure WP (MPa) | Test Pressure (MPa) | Test Temperature (°C) | |
Seal | Strength | ||||
EG41J W-16 | 20-50 | 1.6 | 1.76 | 2.4 | Normal Temperature |
EG41J W-10 | 65-200 | 1.0 | 1.1 | 1.5 | |
| Machinery & Equipment/Valves/Diaphragm Valves | |
